Question

the force experience by dielectric in moving down the capacitor is .​

Answer 1

Answer:

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• If the capacitor has a constant charge then the change in energy stored dU in the capacitor C when the dielectric is moved a distance dx in a direction parallel to the sides of the plates is dU=−Fdx where F is the force on the dielectric.

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Answer 2

Answer:

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Step-by-step explanation:

When we insert dielectric in a charged capacitor then, dielectric is attracted by the capacitor which makes dielectric being "sucked up" by the capacitor. Now, in order to derive the formula for force on dielectric, we apply energy conservation which I feel to be wrong as heat will be lost and hence energy conservation should not be applied, furthermore I feel that the energy term in the derivation corresponding to work done by force is actually heat released in the process.Where am I going wrong, also see [ Heat produced when dielectric inserted in a capacitor ] for more clarification of the doubt. Thanks